Ed 50
The Nikon ED 50 is a great piece if you can live with the limited power range (33x or so from memory). I bought mine after reading reviews and getting some input from Bitterroot about 2 years ago. It is SOOOOO lightweight you end up always having it. It fits in the top flap, detachable fanny pack/ cover hood of my pack or my glove box even if i have the padded cover on it. It has good resolution to the extent of the magnification. My only regret with it is that i found myself wanting more scope power at times. If i was always gonna be under pack, i would live with it. An ounce at dawn is a pound at dusk to reference an old backpacker saying. Vortex now has a competitive model also but i trust the Nikon. I know you see the Eastmans using them on their pack trips from time to time...quality glass, light weight.
I am going to buy a larger scope and i am trying to decide whether or not to liquidate mine for a 65mm scope. It will weigh a lot more but i will have more power to judge animals at long range. I know it contradicts the weight concern comment above, but that just makes me cheap not wanting to fund two scopes, not a hippocrit!